The car is the cheap part of the equation, I have enough funds myself to get it into an RX-8 and we can do most of the conversion here at work.
The box is the killer. It really needs to be a dogbox (E85 and 20psi will push it well over 700rwhp I reckon) and TTI look like the go, but as Corey will tell you I'll have to scrap together at LEAST $8k to get one.
The only way I see that happening is work pays for it, we put work sign writing on the car and then I slowly pay off what they want me to pay off.